KDB-GOM
Series
- 30 -
4.18 Main Controller
Voltage , Frequency AC 220V , 50 / 60 Hz
Voltage Range +10% to –15%
Ambient Temp. -15
℃
to 70
℃
Electric Spec.
Ambient Humidity 45 – 90 %
Structure
Casing ABS
Model
KDC – 208-1M
4.18.1 DIP switch setting on main controller
4.18.2 Functions of Main Controllers
4.18.2.1 Pre-Purge
When the boiler operates, the function is to operate blower (fan) first and exhaust the remained air in the combustion
chamber before combustion starts, in order to prevent from immoderate ignition. Pre-Purge time is by achieving the fan’s
light-up RPM ± 200 rpm with more time than 4 ± 1 seconds.
4.18.2.2 Pre-Ignition
After Pre-Purge, the function is to operate ignition transformer previously in order to light up easily before supplying the
fuel (gas) for combustion. Pre-Ignition time is from ON time of ignition transformer till ON time of fuel supply device (gas
valve 2).
DIP Switch adjust part
Max. adjust screw
for secondary gas
pressure
NO ON OFF
1
Trial Run Normal
2
Forced Max.
Combustion
Normal
3
Forced Min.
Combustion
Normal
4
FE FF
5
L.P. Gas Natural Gas
6
Close-Air Type Open Tank System
7
50 Hz 60 Hz
NO
161GOM 201GOM 251GOM 301GOM
8
OFF OFF ON OFF
9
ON ON OFF OFF
10
ON OFF ON ON
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